CRP and pancreatic ductal adenocarcinoma: Therefore, the aim of this study was to determine the prognostic role of several biomarkers—CA19-9, CRP, LAR, NLR, PLR, LMR, miR-22-3p, and miR-885-5p—with the hypothesis that increased levels of the mentioned biomarkers could correlate with poor prognosis in PDAC and possibly create a prognostic model for patients with unresectable pancreatic ductal adenocarcinoma.